Safety blasting-cartridge.



No. $551,367. Faened ian. 2i, i962. F. UEHAWL SAFETY BLSTNE CARTRIDGE.

(Application filed Oct. 15, 1901.)v

Application filed October '15, 3.901.

Be known tent THOMAS DURHAALR citizen of the Unieel Staten, reeiclingai Philn delpliia, county of )liiladelpl1ia,'nnd State of Pennsylvania, lieve invented n certain new useful lmpievemeni; in. Safety Oeniilgee5 of 'which liie following is n Specifi- .Letters Sle. l'", dented January $31, 190% Serial lle. 78.683. (ilo moe.)

Leine the explosive vies held at e' distance fr0 n line @miie ef ille outer reeepeele by enms er e celi'ti'ige pre-per n( eenling in @unmet willi the mills of alie nte? 'ecenele, en as te llelcli'ne cartridge ab distance from ille enter reeepiaele, end in ibis fei'mer application ie lube eeenining ille exnlesive andent-ei receptacle were shown eenst-rneed ef one piece which would prebi longues seen l.

M f im le mi f Hasling-calrtiidges; ably neeeseme @heizbeing runde in meml, i i nded for nu lxnpievewhich have feuml by experiment to be im ion filed by me for prnetienl as fnv: ne iieenenpness and @est el sn l .Des June "il, i901, beni:- manunetui me eeneei'ned. l 65 ing Sei'izl Ne: lil-,031; :md lie-enjeei; e? *Unis En this invention A represents lvlie inn n: i5 my ineent invenen 'is 'he se Consbnet the tube or ree@penale.,l wnicll is adapted te eenle infidge te enable the seine te be tain elle expleeive E, anni Lliis eenstifvutes the n il nl; e eempamtiy'ely small @est cartridge. (l is lie oui'eii'eeepmele, in which ieeiieel in its Working. This the @ni-bridge is insexled.; ln this innerand .7o

les te that elf-ss of blasting-emouter ieceplnele A and C, i'espeelively, preille blasting charge is eenfer te employ n, pnsl'ebeard tube, which nmy mli i fn receptacle which i5 ne mafie by any of the well-known meilies, n :m euterreeepieele filled Willi ,and the lower end of the eaiti'idge ei' inner geniJ se that the blas'- receglaele A is elesefby menne of -lxe passi@ g5 ly surrounded by liqnicl beard disk er plug A', the ends'e Une inne A` s55 Ae en'ioiner the finme arising being lerne@` over ab for the pui-peee e holding plng' in ple. The lower end el Une einer i'eeepziele C i? se closed "ny series ef pnetellenii @liebes e C, 8o and 'elle lower edge ef ge @verzet C2 e'liepnvp'eise e' l pleee. Upen 'lle ngpeie .j C" mne er seemed in an; Je the same, the eonen will new esei`eeci.

' einennyiuginw- "elle eeiix'ige 55u i i5 epee-ilienziei, in we .,e C nre imenla 9o I ,mil l e u smeleiit-ne'bubes A e ileljginiperveus te -ie A. "ne lie upper en@ if alie mixe A of hezee- 95 #e alone@ by a.- enil. E ei pl of eine? i' e e f Le mele inl nite? the explmve been @ele lieviiis coil; nrejees the j ef may De of een i gg'i'eeza'nly ein eiee're wvl E e il se lesiiel F ridge i 1. nur reeeptzl l disk J upward in the center to form the inconcer the cartridge A near the top and bottom and acterdescribed, an outer receptacle composed this lband having -protuberances the'reon adapted to come in contact with the walls ot' the outer receptacle. v

i have found by experiment that the cheapest and most practical material to use`is a cord or rope knotted at frequent intervals and secured around` the cartridge, as illustrated at G, the knots G serving to hold the cartridge and the outer receptacle at a distance from one another for allowing the free circulation of the liquid or gas therebetween, and this rope or cord will also form a cushion in between the two receptacles. After therireextinguishing agent hasvbeen placed in tlie outer receptacle the up'per end of said receptacle is closed by a cork or plug H, through which the fuse'or electric wires may pass.

in Fig. 5 I have shown a modified form ot' the sepa; r." lng-band I, which may be made of cardboard to encircle the cartridge, and this band is notched or perforated at l, so as to hold the receptacles at a distance from one another, but at the saine time allow the free circulation of the re-extinguishing agent therebetween. Of course other forms of bands could be used, 'in which protuberances are formed thereon in a difl'erent'manner.

'-In Fig. 4 l have shown a lnodilication in which the plug at the lower end of the outer receptacle is formed by stamping a cardboard.

verted-cup-shaped projection J. This projection will take the place of the block D, upon which rests the cartridge, and thus the plug closing the lower end of the outer receptacle ind the rest for the cartridge will be formed in one piece. The lower edges ot` the receptacle C would be turned over at C2 to hold the plug in place.

The advantage ot.` my invention is that by constructing/the receptacles of cardboard and coating them with a waterproofing solution l am. enabled to manufacture them at a coinparatively smalbcost, and by the use of the bands I provide a cheap and eiectlvc device for holding the two receptacles apart. l

Of course l do not wish to belimited to the l exact construction here shown, as slight rnodil cations could be made without departing 5 from the spirit ol' my invention.

Having thus fully described my invention, what l' claim as new and useful is l l. In a safety blasting-cartridge, a 1 ceptacle adapted to contain a lire-extinguishing t agent, a cartridgfx within said receptacle, and means for exploding the cartridge in combi` i nation with bands secured around the cartridge, protuberanccs formed upon the bands i at intervals for the purpose of holding thc cartridge at a distance from the outer recep- I tacle and allowing for the free circulation of g the fire-extinguishing agent therebetween, a i block secured in the lower cnd of the outer l receptacle upon which the cartridge rests,

substantially as and for the purpose specified.

7 inasafetyblasting-cartridgeci'thechar l of a pasteboard tube, a plug closing the lo'wer end of said tube, a block secured to the inner face ot said plug, said tube, plug and block coated with waterproofing solution, an inner receptacle adapted to contain the explosive agent, said inner receptacle composed of a pasteboard tube, a pastcboard plug` closing the lower end of the saine, said tube and plug coated with waterproofing solution, a band of cord or rope secured around the inner receptacle near the top and bottom of the saine, said cord or rope lzuottcd'at frequent intervals, a lire-extinguishing agent adapted to be contained in the outer receptacle, substantially as and for the purpose specified.

8. In a blasting cartridge'j ol the character described, an outer `receptacle composed of a pasteboard tube, a plug of paslchoard inserted in the lower end of the tube, the lower edges of the tube being bent underneath the plug to hold thc saine in place, a block sc cured to the inner surface of the center of the plug, said tube, plug and blocl: being coated with a watcrprooling solution, au iuner receptacle adapted to contain the explosive, said receptacle consist-ing of a pasteboard tube, a plug closing the lower end of the'tube, the lower edges of tho tube being turned underneath the plug, said tube and plug being coated with a waterproofing solution, bands secured around tho inner rcceptacle near the top and bottom, protuherances formed upon said bands atlintcrvals for the purpose ot holding the two receptacles apart, tire-extinguishing agent adapted to be contained in the outer receptacle, plugs clos#` ing the inner receptacle and the outer receptacle and means for exploding the cartridge, substantially as and for the purpose speciiied.

4. In combinationwith a cartridge ol' the character described, bands secured around the inner receptacle, said bands consisting ot' cardboarthopen ings formed through the cardboard to allow for the free circulation of Ithe ireextinguishing agent said cardboard ban ds being coated with a Natel-infecting solution, substz'lntially as described.

lnA combination with a. cartridge of thc character described, a plug 'for closing the lower ond oli' the outer receptacle, said plug consisting nl a disk of cardboard having a )rotuberance extending upward in the ccntcr, upon which protubcrance the inner rcccptaole is adapted to rest, the edges of the uterrcceptacle being turned underneath the ish for the purpose of holding thc same in lace, as specified.

In testimony whereof I have hereunto atlixcd mysignaturcin thcprescnceot two subscribing witnesses.

ICO 

